Pump



J. M. SHIMER MayA 22, 1928.

PUMP

Filed April 20. 1927 4 Sheets-sheet 2 m mi INVENTOR May 22, 192s. .1,670,788 J. M. sl-nMER PUMP Filed Aprfil 20, 1927 4 Sheets-Sheet 5 F'IE' 5 INVENTOR May .22,` 192s.

J. M; SHIMER PUMP Filed April 20, 1927 Sheets-Sheet 4 lNvENTo Patented May Z2,

arrive.l f STE;

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JOHN M. SHIMER, 0F qWILKNSBURGf, .PENNSYLVAN1A, -ASSGNQR TO `lIlLSOll"-ISNYIER MANUFACTURING COMPANY, A'CORPORATION OF PENNSYLVANIA.

PUMP.

pplication led April 20,'1927- Serial No; 185,156.

a pumping mechanism ot such construction and arrangement as to permiteither'simplex or duplex operation. y l

y A-further object is lto provide a vcontrol mechanism for separate pump units con-` structed andarrangedto permit the separate units to be operated as independent simplex units or to be combined so as to provide a duplex pump.

A still further ob'ect is to provide 1a pumping mechanism of such arrangement as tor be capable of operation as a single sys- 'tem or as a plurality of separate systems.y

A still further object is to providela pumping mechanism of the `type set forth which Will be rugged in construction, simple in arrangement andeasy to operate.

These and lother objects .which vvill be apparent to those skilled inftliisparticular art are accomplished yby means of the invention illustrated in the accompanying drawings in which Figure l is a diagrammatic `vie'W of a piping layout forming a control system constructed in accordance with one embodiment of this invention. Fig. 2 is a. vieu7 yin elevation of a control vpanel for use with the piping arrangement shown inw Fig. `A1. Fig. 3 is a diagrammatic view of the vsupply and discharge connecconnections are,

tions associated with theA pump vunits employed in connection with the inventioni illustrated in Fig. 1 and Fig. l is a sectional viewshowing ,therelative arrangementv of the steam pilot valve employedV inconn'ection ,with each ofthe pump units, f

The, particularembodilnt of this invention'vvhich has been chosen for `the purposes of illustration contemplates the useor" tvvo separate and 'distinct rpumpf units. y:Piping e 'aSSQCated vwith the" pilot' valve andvvith the steam valve'of eac-h unit such a vvaythat the twounits can be operated separately as simplex 'pumps/or "they may be combined together to provide a single duplex pumpingunit, and this is true even When the main'steam valves of' the tvvo units are operated by. steam under the Control 0f pilot valves instead 0i beine Operatedmechanically. s Suitable valves control theY piping anda single "operating leverfis 'employed fior :Simultaneously Shifting the various valves so that either simplex' or d'upleX action may ybe obtained by the `throwing of the single lever. AThe supply and dis-- charge connections to each of the units are such that it is possible to operate each single unit as a simplex pump entirely @independent the other when this' is necessary or desirable. f g y It is,'of. course, readily` understood that,

inA order to operate-` a .duplex pump, the

steam valve` of one cylinder must be operated by the 1. movement of the piston rod in the other cylinder, andvice versa. This is normally accomplished by `mea-'ns of' ay `set of levers and cranks which vare-operated by cross heads attached tothe respective, pis. ton `rods, as is IWell understood in this `art. It is yessential that these levers and cranks be so arranged that the steamvalve in one cylinder Amoves in the same direction as the piston rod of the other cy'linder which operates it, While the steam valve ofthe 'flatter cylinder must be moved'inthe opposite direction'from the piston rod of the rstcylinder which operates "it. 4 y A Y Inorder to operate a simplex pump, ythe y steam valve of the single 'cylinder must be movedeach time'in a direction opposite to the direction-orl the piston travel. These variousrelative movements voit'steaml valves and operating piston rods are Well understood bythose skilledin this art, and, itwill be'apparentifrom the following descriptirm,w thatthe present invention takes care ot these various conditionsof operation for both duplex and simplex arrangements. 1` As' illustrated', the present invention includes a standard simplex pump unit 5,` and a second similar unit 6,2 each of which is provided with the usualsteam' chest 7 having the slidable steam valve 8 of standard construction. The steamvalves 8, are adapted to be operatedby steam pressure from the chest 7, they low ofwhieh to dierent sides of thefvalve Sis controlled inthe Vfirst unitA 5 by. afpilot valve 9 of standard construction having ay rotatable valve member .10 which is, oscillated in the usual manner tov control the flow.I of operating steam to the associated 'steam valve 8. The pilot valveA has the usual `v exhaust connection l2'. The

y,valve .ports instead of' being connectedV to y valve 9 on the li'rst unit is connected to piping 13, see Fig. 1, leading "to a control panel v 1i Where it is connected to a three-way valve 15,v which in turn is connected on one side to piping 16 leading back to one side of the steam valve in that unit, While the other side of the three-Way valve ieconnecty to piping 17 leading to one side of the steam valve on the othei pump unit 6. The other port ot the pilot `valve 9 on the pump unit 5y is connected to piping 18 leading to second three-Way valve 19 also mounted on the control board and connected at one side to piping 205 leading. back to that side of the steam valve in the unit 5 opposite to the Side connected to the piping 16.l A third l port of the valve 19`is`y connected to piping 21 whichcommunicates with the opposite side ot the Steam valve of' the' unit- V6 .from that oi the piping 17. Theeecoiidpump unit 6 has a pilot valve` 2 Similar in all respects to thepilot 'valve ot the other unit.

it is adapted to control the How of steam to the steam valve'of the other unit 5 ivhen the tivo units `are operated as a duplexpuinp or it is adapted tofcontrol the tloiv ot operating steam to the steam1 valve upon its oivn unit 6 when the latter is operated asa simpler; pump independent of the other unit 5. For this purpose one port ot the pilot valve Q'Qis connected to piping Q3 leading to a three-.Way valve on the control hoard 14 and one side ot which is connected'hy connection 25 to a T Q6, communicating at one sideivith the piping 17 and through itto the stean'i valve ot the unit The third port of the three-Way valve Q4, to Which the piping leads, is connected by piping 27 vto the piping connection 2O leading to the one side of the steam valve in the unit 5. rThe other port ot the pilot valve 22 on rthe unit G is `conneetfxl lo'y piping 29 to a fourth three-- Wav valve 30 also mounted onfthe control panel 11i.- aiid connected by a `short piping 31 to the piping 16. The other port of the three-way valve is connected hy a connection to the pipii'ig 21.

Each of4 the tour three-Waycontrolling valves mounted on the control panel14l; adapted'tohe operated by a single valve operatii'ig lever 33 supported upon a pivot pin 311: and having pin and slot connections ivith two valve operating yolres'36. The piping arrai'igen'ients above described tol gether iviththc three-Way control' valves are so arranged that When the valveoperating lever isr moved to the left7 asA shoivnin Fig. 2,( the pilot valve l9 on the first pump'unit '5 is Yconnected to 'opposite `sides ol the steam valve in the second unit 6 so as to control its operation, While the pilot valve 22 on the rsecondunit 6 is connected to the stea'invalve on the first unit 5. so as to control the latplex pump. lhen the valve operating lever is moved to the' right, ae shown inl Fig.- 2, the `pilot valve on each unit isconnected to the opposite sides of the steam valve on the same unit, thus providing two :1:e;j aratc simplex pumps.

The supply and' discharge connections oi the two units are so arranged that the ,latter can be operated as parte ot entirely separate s vatcms or the supplyv and difchargc connections can he associated so as to torni a ein# gle System.` Ae illustrated in Fig; 3, the supply line 37 for the pump unit is connected through a valve 38 with a supply line 39, audit is also connected through a valve 10 with a'separate supply line 41 so that hy opening or closing one or the other ofther valves 38V and i0 pump'iinit 5 will he supplied iti-oni one or the other ofthe separate supply lines or 41. Similarly, the pump unit 6 has a supply pipe 4t2 'connected through `a valve iS- with the i'irst sup-- plyliue 39 and also connected :through a valve 4.4L With the Second supplyY line It Will he apparent that if valves 38' and 43,

38 is closed and the'rvalve 4-0 opened the First pump lunit will he connected with the supply line 11 and the second pump unit 6 connected Witlrthe tiret supply line The discharge pipe 115 of thelirstnnijt f5 is connected through a `valve /16- with a-'discharge line 47 and through alsecond valve 48 -With a Secondvdiecharge line 49. Similarly,` the discharge 7pipe 50 of the second pump unit 6 isconnected through' ar'valv'e 51 With the first discharge line .47, andA through a. second val-ve livith the second; discharge line 4-9. Either pump unit can operate in connection ivith either supply and either die; charge line. A, l -v M Assuming. that it -i-s desirablefto loperate the two pump units as separate simplex units, the operating lever on the control pane1.14`wil1 be moved to the right, as shown in Fig. 2. This will position the threeiway control valveslso that they steamjtlow through the control 'system' Willvloe as indicated by the solid arrows in Fig, 1. It Willbe seen that steamfwill flowthrough' theport in the pilot valve 9 which is connected to the piping 18 to the three-Way valvek19,ithence through the lpiping 2O toA one si de ket the steam valve on the same unit The other port of the pilot valve 9 i-s connected piping13` With the three-Way valver and valve operating rsteam ,Will ow through "piping 13, val'v e'15 and through piping 16 to the/other side `of thesame steam valve. :Obviouslyhe opera'- tion of the. pump unit .5 will be that Aof yan independent simplex unit. In like mannerk lli one port of the pilot valve 22 on the second pump unit-6 is connected through the pipingv y piping 21 to' the other side ot' the steam valve of the second unit 6. `Obviously, this unit 6 will then operate as a separate independent simplex uni t.

When it is desired to operate the two pump units 5 and 6 as a single duplex pump l in which the pistons are provided with the overlapping stroke essential to true duplex operation the valve controlling lever 33 is moved to the lett, as shown in Fig. 2. When in this position the steam flow is as shown by dotted arrows on Fig. 1. The pilot valve on the unit 5 is then connected with the steam valve of the unit 6 and vice versa so that the steam valves on each side of the duplex pump will be operated by the pistons on the other sides. Operating .steam for: the steam valve in the unit 6 will flow from the pilot valve 9 through the piping 18, three-way valve 19, piping 21 to the steam valve ot the unit 6. From the other port oitthe pilot valve 9 steam will iiow through piping 13, three-way valve 15 and piping 17 to the oppo-site side of the steam valve in the unit 6. Similarly the pilot valve 22 of the pump unit 6 controls the operation of the steam valve in the pump unit 5. One port of the pilot valve 22 is connected through piping 23 and three-way valve 24 to the connection 27, leading to the piping 20, connecting with one side ofthe steam valve of unit 5. The other port of the pilot valve 22 is connected through piping 29, three-way valve 30 and connection 3l to piping 16,

i leading to the other side of the steam valve in the unit 5. When the two units are associated together into a single duplex pump, they are connected to the same .supply and discharge systems. For example, the valves 40 and 44 may be closed and the valves 38 and 43 opened so that the supply pipes ot both units are fed from the supply line 39. Obviously, the line 39 can be cut ot'f and the second supply line 41 used to supply both units if desired. Similarly, each unit i-s connected to a single discharge line for duplex operation. The supply and'discharge arrangements tor simplex operation may be as desired. If it is necessary to shut down any oi" the uni-ts, for example, during duplex operation, the valves associated with the supply and discharge lines of that unit may all be closed and the other unit employed for continuing the circulation through the system. This is particularly advantageous in the pumping of hot liquids, such, for example, as hot oil employed in cracking plants.

LettersfPatentis:

operated in the usual ymanner known inthe art. l p Although I have described what I non7 as i is well considerto be the'prefe'rred arrangementv of this invention it will be apparent that various changes, additions, omissions and substitutions can be made therein without` departing from the spirit of the invention or the scope of' the appended claims. What I claim as newvand desire to .Secur L1. The combination "with independent steam cylinders and pistons, each having pilot and steam valves, of a control s ystem including piping connections between each pilot valve and each-steam valve, and mechanism for controlling the iow through said connections so that the pilot valve on each cylinder is connected to the steam valve on the same cylinder for independent operation of said pistons, or the pilot valve on cach cylinder is connected to the steam valve ot the other cylinder for duplex operation o'l said pistons.

2. The combination with independent steam cylinders and pistons, each 'having pilot and steam valves, of a control system including piping connections `between each pilot valve and each steam valve, a centralr control station, and means at said station for controlling the flow through said piping connections so that the pilot valve on each cylinder is connected to the steam valve of thc same cylinder for independent operation of saidvpistons, or is connected to the steam valve on the other cylinder for duplex operation ot said pistons.

3. The combination with piping connections between said control sta-v tion and each of said pilot and steam valves, control valves for directing the flow through independent steam cylinders and pistons, each having 4pilot and steam valves, of a control station, ,105 y independent f said piping connections so as to cause said v steam through said connections'so as to cause f As heretofore pointed out each pilot valve said pistons to operate independently 4of each 'other or to operate as a single duplex unit.

GQ The combination with independent steam cylinders and pistons, each having pilot and steam Vzilves,y o'fineelianisin for controlling the operation of each steam valve by the associated pilot valve or 'for controlling the operation of each steam Valve by the pilot valve on the other cylinder, and a ,single operating lever for controlling said mechanism. y

7 The combination. ywith independent steam cylinders vand pistons, each having pilot and steam Valves, of a fluid. pressure mechanism iforcontrolling the operation of euch steam Valve by f the associated pilot valve or for controlling the operation'of each steam valve by the pilot Valve on the other ycylinder, and a, single operating,l lever `for controlling said mechanism.

In testimony whereof, I havehereunto subscribed my name this 18th dayof April,

i JOHN M. sHIMER. 

